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Thread: Complimentary Upgrades on Delta, the Definitive Thread
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Old Feb 15, 2022, 9:57 am
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Zorak
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Originally Posted by zitsky
FO means?
FO is the commonly used abbreviation on FlyerTalk for Silver Medallions. According to some this avoids confusion of SM with SkyMiles, or is a historical throwback to either Flying Orchid or Flies Often, or all of the above.

Sampling of related threads:

What is an “FO?”

What does "F0" after my Skymiles number mean?
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